ok, I just upgraded to the T-Mobile 8320 with Wi-Fi, and somewhat understand that UMA can enable you to make calls from another country (for me that would be Mexico) to the US at local based rates (using minutes from your plan).

Whats the difference between uma and UMA? I am connected to my home network now and it shows UMA. When i make international calls from my 8320 to mexico from at home using UMA, the calls are tinny and cut out. On the Edge network it doesn't seem too have that problem.

Also, i thought I could browse the web much faster when connected thru Wi-Fi, but that doesn't seem to be the case either?

Is there any way to make free calls to international locations with the 8320?